package lwh.table;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import lwh.utils.DBHelper;

public class SysTabTimestamps extends HttpServlet {

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		String tab_name=new String(request.getParameter("tab_name").getBytes("ISO8859-1"),"UTF-8");
		String sql="SELECT * from sys_tab_timestamps where tab_name=?";
		StringBuilder builder=new StringBuilder();
		Connection con=null;
		try {
			
			PreparedStatement stat=null;
			ResultSet rs=null;
			con=DBHelper.getConnection();
			stat=con.prepareStatement(sql);
			stat.setString(1, tab_name);
			rs = stat.executeQuery();
			builder.append("[");
			while(rs.next())
			{
				builder.append("{");
				builder.append("tab_name:\"").append(rs.getString("tab_name")).append("\",");
				builder.append("tab_timestamp:\"").append(rs.getString("tab_timestamp")).append("\"");
				builder.append("},");
			}
			if(builder.toString().equals("[")){
				
			}else{
				builder.deleteCharAt(builder.length()-1);
			}
			builder.append("]");
		} catch (SQLException e) {
			e.printStackTrace();
		}finally{
			try {
				con.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		request.setAttribute("json", builder.toString());
		request.getRequestDispatcher("/WEB-INF/page/departmentJson.jsp").forward(request,response);
	}

}
